<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		 <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"/>
    <link rel="stylesheet" href="css/bootstrap.min.css"/>
    <style>
        body {
            margin-top: 20px;
            color: #fff;
        }

        .container {
            outline: 1px solid red;
        }

        .row div {
            background: red;
        }
    </style>
	</head>
	<body>
		<div class="container">
    <div class="row">
        <div class="col-md-1">col-md-1</div>
        <div class="col-md-1">col-md-1</div>
        <div class="col-md-1">col-md-1</div>
        <div class="col-md-4 col-md-offset-4">col-md-1 col-md-offset-4</div>
    </div>
    <br/>

    <div class="row">
        <div class="col-md-4 col-md-offset-4">col-md-4 col-md-offset-4</div>
    </div>
    <br/>

    <div class="row">
        <div class="col-md-6 col-md-offset-6">col-md-6 col-md-offset-6</div>
    </div>
	</body>
</html>
